Minazuki: The Triangular Sweet Eaten on the Last Day of June

A cool triangle of steamed rice cake topped with red beans turns the end of June into a small, sweet ritual of renewal.

Published October 21, 2026 at 11:25 PM JST | By Tokyo Paul

Quick answer: Minazuki is a triangular wagashi made from soft steamed rice-flour cake (uiro) topped with sweet azuki beans, traditionally eaten in Kyoto on June 30. The triangle recalls a shard of ice, and the red beans are believed to ward off evil, so the sweet is eaten for good health through the hot months ahead.

Visitors to Kyoto in late June may notice pale, triangular sweets with dark red beans in shop windows and department store counters. The sweet is called minazuki, and it marks the halfway point of the year with a mix of court history, Shinto purification and seasonal eating. This guide explains what minazuki is, why it is triangular, how it connects to ice and the old imperial court, how it relates to the summer purification ritual, and how visitors can find and enjoy it while respecting local customs.

What minazuki is

Minazuki is a Japanese confection built from a base of uiro, a soft, slightly chewy steamed cake made from rice flour and sugar. The cake is cut into a triangle, then topped with sweet azuki beans. Shops may vary the details, but the basic structure of a triangle topped with beans stays the same.

Uiro has its own unusual story. A Kyoto tourism article notes that the word comes from the name of a medicine once used in Japan, which is a reminder that many wagashi began as imported or practical foods before becoming treats. The result is a texture that feels springy and cool rather than gooey.

Because the sweet is steamed and served fresh, it tastes light even though the beans are sweet. That lightness is intentional, since minazuki is meant to be eaten in the heat of early summer.

Why June 30 matters

In the old calendar, the sixth month had a name that is still used in poetry, and that name is minazuki. A tea association article explains that the word is often read as the month without water, but the middle syllable is actually a particle meaning of, so the true sense is month of water, which fits the rainy season. The sweet takes its name from that month.

Today people eat it on June 30, which falls near the middle of the year. Some Kyoto shops make it only for the last day of the month, and customers line up early to buy it. Others sell it throughout June, and it also appears at tea gatherings during the month.

The date is special because it is tied to a Shinto custom that marks the end of the first half of the year. That ritual is the reason the sweet is more than a seasonal snack.

Ice, the court and a sweet substitute

The most widely told explanation for the triangle is that it stands in for ice. Before refrigeration, natural ice was cut in winter and stored in cellars or ice houses in mountain areas, then kept until summer. Court nobles in Kyoto enjoyed this ice to cool down at a ritual during the hot season.

Ordinary people could not obtain ice, so they made a sweet that resembled it. A tea association article explains that the triangular shape represents a shard of ice. Eating the sweet became a way to share the cooling feeling of the court ritual.

Sources differ about the exact day of the court ice ceremony, and some accounts place it on the first of June while others link the story to the last day of the month. What is consistent is the central idea: a sweet that gives the image of ice to people who did not have any.

Red beans and protection from misfortune

Azuki beans are the second symbol. In Japanese tradition their red color is believed to drive away evil spirits, which is why they appear in celebratory foods and in some seasonal rituals. A tea association article notes that the beans on minazuki are believed to have power to ward off evil.

A Kyoto tourism article adds that some people connect the custom to the use of azuki beans at Setsubun, the bean-throwing festival of early February, as another example of red beans used as protection. This is a second theory and does not contradict the first.

The beans are usually soft and glossy, simmered in sugar until tender. They sit on the cool base like small gems and give each bite a contrast in texture.

The summer purification ritual

The sweet is closely tied to Nagoshi no Harae, a Shinto purification held at shrines across Japan at the end of June. The ritual is meant to clear the impurities that have gathered during the first six months of the year and to pray for health in the second half.

At many shrines, visitors walk through a large ring woven from chigaya, a type of reed grass,. A tea association article explains that people pass through the rings to cleanse misfortune and pray for health, and that eating minazuki on the same day is believed to help bring freedom from illness and disaster.

Seen together, the two customs make a tidy pair: one is a ritual walk, and the other is a sweet to eat afterward. Visitors in Kyoto can experience both on the same afternoon if they plan ahead.

How the sweet fits into the rainy season

Minazuki falls in the rainy season, a period when Japan is humid and gray before the real heat arrives. Wagashi makers respond with sweets that feel fresh and cool, and minazuki is one of the clearest examples.

The sweet also fits the wider idea of seasonal eating, called shun, which means enjoying foods at their moment. Many Kyoto shops arrange special displays for June, with seasonal motifs and cool, clear sweets sitting beside the triangles.

Because the season is wet, sweets are often served with chilled tea or a light cup of green tea. Visitors who want to try the pairing can ask the shop which tea suits the sweet.

Where to find minazuki

Minazuki is sold mainly in June, with the strongest demand in the last days of the month. A Kyoto tourism article names traditional shops such as Tawaraya Yoshitomi, which takes reservations ahead of the season, and notes that the sweet also appears at everyday neighborhood confectioners, high-end sweet makers and the sweets sections of supermarkets.

The same article mentions a tea room inside the Kyoto confectionery museum that serves seasonal sweets near the end of June. Prices, hours and availability change from year to year, so visitors should confirm details on the shop or museum website before traveling.

Because some shops sell out quickly on the last day, reserving in advance or visiting early in the day is wise. Staff can explain whether a particular shop sells the sweet only on June 30 or throughout the month.

Tasting and etiquette

Minazuki is simple to eat. It is usually served on a small plate with a pick or a wooden knife. Cut off a small piece, making sure to include both the base and a few beans, and eat it before taking a sip of tea.

Many wagashi are best eaten within a short time because they are made without long-lasting additives. Check the label or ask the shop how long the sweet will keep. Ingredients vary by maker, so travelers with allergies or dietary needs should read labels or ask about rice flour, sugar and beans before buying.

If you are visiting a shrine for Nagoshi no Harae, follow the guidance posted at the entrance and wait your turn at the grass ring, since the ritual is meant to be done calmly.

Connecting minazuki to other Japanese customs

Minazuki is one of many foods that turn a calendar date into a shared experience. Setsubun beans, New Year rice cakes and autumn chestnut sweets all do the same, and each links nature, belief and taste.

It also shows how Kyoto customs preserve the memory of the imperial court. A triangle of rice cake may look modest, but it carries an echo of ice stored in the mountains and enjoyed by nobles.

For travelers, the best way to appreciate it is to plan a short June or early summer visit, try the sweet with tea, and enjoy a walk through a shrine ring. It is a small, friendly way to feel the rhythm of the Japanese year.

Want to go deeper? Tokyo Paul's book 30 Japanese Wagashi, Seasonal Sweets, and Childhood Classics is available on Amazon.

Frequently Asked Questions

What is minazuki?

Minazuki is a triangular Japanese sweet made from steamed rice-flour cake called uiro with sweet azuki beans on top. It is traditionally eaten in Kyoto on June 30. The triangle represents a piece of ice, and the red beans are believed to ward off evil, so people eat it to stay healthy through summer.

Why is minazuki eaten on June 30?

June 30 marks the halfway point of the year and the time of Nagoshi no Harae, a Shinto purification held at shrines. Eating minazuki on that day is believed to help ward off illness and misfortune for the second half of the year. The custom is also linked to the old court practice of enjoying stored ice in summer.

Can visitors buy minazuki outside Kyoto?

Minazuki is most strongly associated with Kyoto, but traditional sweet shops, department stores and supermarkets in other regions sometimes sell versions in June. Availability and style vary, so visitors should check with local shops. For authentic versions near the end of the month, Kyoto confectioners are the best bet, and advance reservations are often helpful.

Further Reading

To explore further, see Minazuki, a sweet June custom in Kyoto and Minazuki: Kyoto's Triangular Sweet That Tastes Like Summer.

Keep Exploring

More guides from Tokyo Paul: Nagoshi no Harae: The Summer Purification and Grass Ring, Uiro: The Soft Steamed Rice Flour Sweet and Tsuyu: Traveling Japan During the Rainy Season.